I posted B&O cartridge to someone worth approximately £200 1st signed for And it never arrived after contacting the royal mail filling in all their forms etc giving proof of value they refuse to pay anything and just keep saying that is not proof of value and will not tell me what will classify as proof of value it was insured to £50 and that is all I am asking for seriously considering taking them to court they have wasted more than £50 of my time with there nonsense it is

The earpiece moves to make it more comfortable the release takes the bit of plastic out of the metal hole's on the ear cup allowing it to move and then springs back in to hold it in place so depending on how its stuck? it might be very uncomfortable, I have a few of these but have never had this problem

Yes tantalums are different so I would not replace with aluminum electrolytic but would be interested if anyone else has opinions on the matter, Also they do not seem to drift in my experience, I would think to replace them with aluminum electrolytic would just be causing a problem for the future with no benefit?